Determination of the absolute harvesting age of Paulownia even-aged stands in Dr. Bahramnia's Forest Management Project

Document Type : Research article

Authors

1 M.Sc. Student, Dept of Forestry, Faculty of Forest Sciences, Gorgan University of Agricultur and Natural Resources Sciences

2 Associate prof., Dept of Forestry, Faculty of Forest Sciences, Gorgan University of Agricultur and Natural Resources Sciences

3 Assistant prof., Dept of Forestry, Faculty of Forest Sciences, Gorgan University of Agricultur and Natural Resources Sciences

Abstract

To determine the best absolute harvesting age (quantitative purpose) and maximum production per area of a 18- year-old stands of Paulownia fortunei plantation at Dr. Bahramnia Forest Management project, Three spacing treatments including 3x6, 5x8 and 6x10 m. were examined. Five typic trees with normal diameter class distribution were chosen from each spacing treatment, randomly. The selected trees were fell down and sample discs were made from the stems at 0.4, 1.3 m. and then at 2 m. intervals between 1.3 m. and top height. Diameter and height growth were measured, based on stem analysis method. Stand volume, mean and current annual volume growth at different age stages were calculated, based on calculating fom factor at various age stages. Overall, the absolute harvesting age (forester’s criteria) was determined. The results showed that the absolute harvesting ages at 3x6, 5x8 and 6x10 m. spacing treatments were 11, 11 and 13 years, respectively. In addition, the trees at 5x8 m. spacing treatment had the greatest individual mean annual volume growth, but in respect to trees density per hectar, the trees at 3x6 m. spacing treatment achieved the heighest mean annual wood production per hectar in comparison to the other spacing treatments, which was 525/98 m3/ha. Therefore, it could be concluded that if the aim of Paulownia plantation is quantitative wood production, the spacing of 3x6 m. will be the best, but if the purpose is agroforestry, the spacing of 6x10 m. will be better than the spacing of 5x8 m.

Keywords


- Anonymous, 2006. Second Revise Forest Management Project Booklet. Series1 of Dr. Bahramnia Educatinal and Research Forest, 481 p.
- Azadfar, D. and Saeedi, Z., 2010. Effect of spacing on growth characteristics of Paulownia fortunei (Case study: Dr Bahram Nia forest management plan, Gorgan). Iranian Journal of Forest, 2(2): 151-163.
- Carpenter, S.B., 1977. This ''Princess'' heals disturbed land. American Forests, 88: 22-23
- Jimenez, L., Rodriguez, A., Ferrer, J.L., Perez, A. and Angulo, V., 2005. La Paulownia: una planta de ra´pido crecimiento como materia prima para la fabricacio´n de papel. Afinidad, 62(516): 100-105.
- Hassanabbasi, N.A. and Alizadehhesari, M.K., 1998. Properties and uses of wood for aircraft Paulownia, Glaydrv Havrgraft. Second National Conference on Aerospace Engineering, Esfahan, 12-14 Oct: 823-827.
- Hassanzad Navroodi, I. and Rostami, T., 2007. Evaluation of the growth potential of Paulownia furtunei in Guilan province. Proceedings from an International Conference. Improving the Triple Bottom Line Returns from Small-scale Forestry, Ormoc, the Philippines, 18 - 21 June 2007: 197-204.
- Otadi, F., 2001. Evaluation of growth and wood properties of Paulownia. Proceedings of the Second International Meeting on Forests and Industry, Vol. II: 1-18.
- Rahmani, Z., 2005. Identification of the most appropriate period of Populus deltoides 77/51 .yield utilization Research project. Safrabasteh Experimental Station, Astaneh Ashrafieh City, Guilan province, I.R. Iran: 1-2.
- Sidhu, D.S. and Dhillon, P.S., 2007. Field performance of ten clones and two sizes of planting stock of Populus deltoides on the Indogangetic plains of India, New Forest, 34 (2):115-122.
- Swamy, S.L., Mishra, A. and Puri, S., 2006. Comparison of growth, biomass and nutrient distribution in five promising clones of Populus deltoides under an agrisilviculture system. Bioresource Technology, 97: 57-68.
- Van de Hoef, L., 2003. Paulownia. Agriculture Notes (AGO778), ISSN 1329-8062, A site in north east Victoria state, Department of primary industries, Box Hill, Melbourne, Australia: 1-3.
- Wang, Q. and Shogren, J.F., 1992. Characteristic of the crop Paulownia system in China. Agric. Ecosys. Environ., 39: 145-152.
- Zhu, Z.H., Cha, C.J., Lux, Y. and Xiong, Y.G., 1986. Paulownia in china: cultivation and utilization. Asian Network for Biological Sciences, Republic of Singapore and international Development Research Center, Canada, 65 p.